Ultra-violet dental apparatus on a tripod. It consists of an electric arc which uses carbon to produce ultra-violet (UV) radiation. Metal shields and tubes enclose the arc allowing the radiation to be focused within the mouth or on the face. Made by Arnold and Sons | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / British Dental Association Museum |
Taille de l’image : | 3862 px × 4575 px |
Model Release : | Non requis |
Restrictions : |
|